Comentarii la: Pășirea catargului!

De: Curtis Wright

Curtis Wright — Mon, 06 Nov 2023 01:00:30 +0000

You got the corrosion mechanisms correct. Good Job.

De: Calluna

Calluna — Sun, 05 Nov 2023 23:17:12 +0000

Dyneema is cool stuff

De: Tom P

Tom P — Sun, 05 Nov 2023 20:52:34 +0000

This project NEVER ceases to amaze me! Even the milled lumber is beautiful…

De: Florian Fleischmann

Florian Fleischmann — Sun, 05 Nov 2023 13:49:10 +0000

Leo, as much as I like interios joinery, to a sailor the mast is super interesting. Can you do more on it, like a walktrough of every foot and every fitting, please?!

De: tamar

tamar — Sun, 05 Nov 2023 04:30:21 +0000

Leo… have you a lot of work to do? You never mentioned it. Seriously a beautiful boat you are building.

De: Boyd Grandy

Boyd Grandy — Sun, 05 Nov 2023 02:34:57 +0000

Use of ultra-high-molecular-weight polyethylene rope as standing rigging makes sense, and the traditional serving of the line does appear to mitigate the potential aging and wear vulnerabilities of the material. Dyneema is the trade name of this product as used on Tally Ho.
Ultra-high-molecular-weight polyethylene is very surface slick, so it doesn't like knots. One the one hand, a knot will slip under load and on the other, it is really hard to get a knot out of the stuff. Although noted as a strength of the material, the material does not stretch more than 4% before it parts, so being able to assess the condition of the rigging under heavy loads that may compromise the rope is difficult by visual means.
It should be possible to over build the standing rigging to withstand a greater than worst possible case with ease, the only obstacle being the cost per linear foot of the appropriate rope diameter and stranding. Hopefully, that is what has been done on the design of the standing rigging on Tally Ho.
While this application is nowhere nearly as critical as the design and use of materials was in the failed Titan submersible, it is still based on the newest wonder stuff. It appears that the rig will be good for 10 years at least, but beyond that is well past the history of this material in shipboard use. Just sayin'.

De: streetburned

streetburned — Sun, 05 Nov 2023 02:19:43 +0000

looking good!

De: Boyd Grandy

Boyd Grandy — Sun, 05 Nov 2023 02:03:58 +0000

Austinetic stainless steel is susceptible to a form of corrosion called chloride stress cracking. The metal has to be in tension (like standing rigging fittings) and has to be in contact with chloride ions (typically found in abundance in sea water). The chloride contamination would be universal in a wire rope application, with the cracking not showing on the surface, and with the strands of the wire rope allowing the chloride contamination to wick into the interior of the wire. Individual strands would eventually fail, reducing the overall tensile strength of the rope and can lead to catastrophic failure of the piece. This type of corrosion likes high temperatures (>60C) but will occur at lower temperatures at a slower rate.

De: Sancho 77

Sancho 77 — Sat, 04 Nov 2023 18:35:41 +0000

They called my wooden boat in Stepnica (PL) a "furniture". Your´s is a wooden Skulpture !!

De: Bika

Bika — Sat, 04 Nov 2023 13:03:01 +0000

Tally Ho is the perfect boat. Just perfect!